Update unit test after rename of --test-files argument.
Update unit test after rename of --test-files argument.

mikaelrandy/atoum,tejerka/atoum,vonglasow/atoum,agallou/atoum,GuillaumeDievart/atoum,vonglasow/atoum,Tiross/atoum,mikaelrandy/atoum,jubianchi/atoum,gpaton/atoum,CedCannes/atoum,CedCannes/atoum,GuillaumeDievart/atoum,mageekguy/atoum,tejerka/atoum,mageekguy/atoum,gpaton/atoum,Tiross/atoum,agallou/atoum,jubianchi/atoum